Water filter housing cap



FIG. 1 is a perspective view of a water filter housing cap of the present invention;

FIG. 2 is a left side view thereof, the right side being a mirror image thereof;

FIG. 3 is a bottom view thereof; and,

FIG. 4 is a top view thereof.

The broken lines showing environmental structure are for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a water filter housing cap, as shown. 